CN103195427A - Shovel top and bottom cutting type one-time full-height fully-mechanized mining method for extremely soft thick coal seam - Google Patents
Shovel top and bottom cutting type one-time full-height fully-mechanized mining method for extremely soft thick coal seam Download PDFInfo
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- CN103195427A CN103195427A CN2013101201747A CN201310120174A CN103195427A CN 103195427 A CN103195427 A CN 103195427A CN 2013101201747 A CN2013101201747 A CN 2013101201747A CN 201310120174 A CN201310120174 A CN 201310120174A CN 103195427 A CN103195427 A CN 103195427A
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Abstract
The invention provides a shovel top bottom cutting type one-time mining full-height fully-mechanized mining method for an extremely soft thick coal seam. In the process of extraction, the distance between the beam ends of the support top beams is close to zero or a negative value, the front ends of the shovel type telescopic beams are provided with coal shoveling plates, after the front rollers of the coal mining machine cut bottom coal, the coal shoveling plates stretch out in time, top coal can be shoveled under the condition that the top coal falls insufficiently, exposed top plates can be protected in time, roof fall accidents are avoided, the stroke of the telescopic coal shoveling plates is larger than the cutting depth of the coal mining machine, and then the rear rollers are utilized to load fallen coal. The method has the advantages of cost saving, simple process, safety, high efficiency and the like for the coal bed condition of an extremely soft (f < 0.5) thick coal bed (3.5-6 m).
Description
Technical field
The present invention relates to a kind of coal-mining method of dead-soft high seam, and particularly combine mining method relevant for formula full-seam mining at the bottom of a kind of dead-soft high seam shovel vertex cut.
Background technology
The full-seam mining coal-mining method is one of China's high seam high-efficiency mining method, be used widely in China, and it is very high to the requirement of support.At present, the supporting mode of full-seam mining coal-mining method work plane generally is immediate support, machine mining height degree is the bracket support height, keep certain beam-ends distance during the coal-winning machine coal cutting between set cap front end and rib, after the coal mining machine roller coal cutting, support in time moves frame with machine, so be called " immediate support ".Be considered to more rational support pattern for this supporting method of general high seam.
Yet (3.5～6m), because rock mass is weak glued, coal is the loose media state, is adopting under the leading pressure effect, and rib and top, support the place ahead coal sheet emit seriously, and be uncontrollable, that is to say that wall caving is inevitable for dead-soft (f＜0.5) high seam.Adopt the above-mentioned production practice can't ordinary production, and for the dead-soft coal seam, the production efficiency that how to utilize the characteristics in coal seam self to improve the coal seam solves the extremely low problem of other exploitation method efficient, and this difficult problem is perplexing coal enterprise for a long time.
To sum up, how to realize that safety, the coal-mining method of exploiting this class dead-soft coal seam efficiently are the important goals of difficult mining coal seam production technique development.
Summary of the invention
The effective ways that the purpose of this invention is to provide a kind of utmost point loose thick coal layer full-seam mining exploitation, use this kind coal-mining method can effectively control roof, avoid coal-winning machine coal mining hourglass top, and the characteristics that can also utilize the easy wall caving of soft seam improve coal cutting efficient, realize that all-time high mining face efficiently advances fast.
For reaching above-mentioned purpose, formula full-seam mining is combined mining method at the bottom of the dead-soft high seam shovel vertex cut of the present invention, comprises the following steps:
Stope drift active workings tunnel along the top, coal seam, work plane and coal seam overlapping mode are for tilting to overlap namely by degree of propelling every day, in big mining and high comprehensive mining work plane haulage way, along the advance of the face direction ground coal is manually played the end 4～6m, ground coal plays bottom sloping less than 10 °, with this as stope drift active workings and work plane overlapping mode and reclaim the end ground coal.
The work plane coal cutting that circulates, coal mining machine roller under the hydraulic support back timber cut, coaling, wherein the coal-winning machine front roll cuts ground coal, back roll dress coal breakage, the roof fall of working face wall wall caving reaches a dynamic equilibrium, along with the carrying out of coalingging, and the further wall caving of rib, shovel extensible canopy ramp plate stretches out, shovel caving coal and thrust gear are pushed conveyer to rib, behind the moving conveyor, and the operation thrust gear, with the hydraulic support reach, carry out real-time supporting.
Further, wherein, the Matching Relationship that work plane full-seam mining hydraulic support and drag conveyor and coal-winning machine form be the coal-winning machine cut when mining the back timber front end to the distance of rib close to zero or during negative value, hydraulic support is passed jack piston rod and is in whole retracted states.
Further, the front end of hydraulic support back timber is forestope, and the forestope front end is the shovel extensible canopy, and the shovel extensible canopy is built-in for the jack that connects and support the shovel extensible canopy.Wherein, the flexible stroke of extensible canopy jack cuts dark greater than one of coal-winning machine.
Beneficial effect of the present invention is: not only can shovel under the inadequate situation of top coal inbreak and fall the top coal, can also in time protect exposed top board, avoid causing roof fall accident, can also utilize back roll dress coal breakage, can exploit the dead-soft coal seam efficiently and safely.
Description of drawings
Fig. 1 is the leading artificial end schematic diagram that rises in stope drift active workings layout and the tunnel.
Fig. 2 for dead-soft high seam shovel vertex cut at the bottom of the exploitation circulation schematic diagram of formula.
Fig. 3 is coal-winning machine coal cutting schematic diagram.
Fig. 4 is the hydraulic rack structure figure that is adapted to shovel formula full-seam mining coal-mining method at the bottom of the vertex cut.
Among the figure: 1, coal-winning machine; 2, conveyer; 3, hydraulic support; 4, stope drift active workings; 5, shovel extensible canopy; 6, forestope; 7, back timber; 8, front roll; 9, back roll; 10, coal breakage.
The specific embodiment
In order more to understand technology contents of the present invention, especially exemplified by specific embodiment and cooperate appended graphic being described as follows.
Formula full-seam mining is combined mining method at the bottom of the dead-soft high seam shovel vertex cut of the present invention, comprises the following steps:
Stope drift active workings tunnel along the top, coal seam, work plane and coal seam overlapping mode are for tilting to overlap namely by degree of propelling every day, in big mining and high comprehensive mining work plane haulage way, along the advance of the face direction ground coal is manually played the end 4～6m, ground coal plays bottom sloping less than 10 °, with this as stope drift active workings and work plane overlapping mode and reclaim the end ground coal, specifically as shown in Figure 1.
In carrying out exploitation process, the work plane coal cutting that circulates, under the dead-soft coal seam conditions, coal-winning machine 1 is advance support at the Matching Relationship of hydraulic support 3, be machine adopt the cut working cycles when beginning coal-winning machine 1 cylinder at 7 times cuts of hydraulic support 3 back timbers, coaling, shown in Fig. 2 (a).Wherein coal-winning machine front roll 8 cuts ground coal, back roll 9 dress coal breakages 10, as shown in Figure 3.This moment, the roof fall of working face wall wall caving reached a dynamic equilibrium, coal mining efficient height, safety is secure, along with the carrying out of coalingging, the further wall caving of rib, available shovel extensible canopy 5 falls the top coal shovel, shown in Fig. 2 (b), under state shown in Fig. 2 (b), the operation thrust gear is pushed conveyer 2 to rib, shown in Fig. 2 (c), behind the moving conveyor 2, the operation thrust gear with hydraulic support 3 reaches, forms Fig. 2 (d) state, carry out real-time supporting, thereby finish a working cycles, form the fully mechanized mining feature, realize the safety of the full-seam mining of dead-soft high seam, high-efficiency mining.
Further, in the present embodiment, the Matching Relationship that work plane full-seam mining hydraulic support and drag conveyor and coal-winning machine form is the set cap beam-ends apart from (the back timber front end was to the distance of rib when the coal-winning machine cut was mined) close to zero or during negative value, hydraulic support is passed jack piston rod and is in whole retracted states, and the stroke of telescopic ramp plate cuts dark greater than one of coal-winning machine.
Fig. 4 is the hydraulic rack structure figure that is adapted to shovel formula full-seam mining coal-mining method at the bottom of the vertex cut.Be with the improvement of conventional hydraulic support, increase the structure of shovel extensible canopy 5, improvement forestope 6: specifically be exactly to have increased shovel extensible canopy 5 extendable rooms, the built-in jack that is used for connecting and supporting shovel extensible canopy 5, the quick shovel of realizing the top coal fall and to the immediate support of top board.
In sum, utilize method of the present invention effectively to control roof, avoid coal-winning machine coal mining hourglass top, and can also utilize the characteristics of the easy wall caving of soft seam to improve coal cutting efficient, realize that all-time high mining face efficiently advances fast.
Though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (4)
1. formula full-seam mining was combined mining method at the bottom of a dead-soft high seam shoveled vertex cut, it is characterized in that, comprised the following steps:
Stope drift active workings tunnel along the top, coal seam, work plane and coal seam overlapping mode are for tilting to overlap namely by degree of propelling every day, in big mining and high comprehensive mining work plane haulage way, along the advance of the face direction ground coal is manually played the end 4～6m, ground coal plays bottom sloping less than 10 °, with this as stope drift active workings and work plane overlapping mode and reclaim the end ground coal;
The work plane coal cutting that circulates, coal mining machine roller under the hydraulic support back timber cut, coaling, wherein the coal-winning machine front roll cuts ground coal, back roll dress coal breakage, the roof fall of working face wall wall caving reaches a dynamic equilibrium, along with the carrying out of coalingging, and the further wall caving of rib, the ramp plate of shovel extensible canopy stretches out, shovel caving coal and thrust gear are pushed conveyer to rib, behind the moving conveyor, and the operation thrust gear, with the hydraulic support reach, carry out real-time supporting.
2. formula full-seam mining is combined mining method at the bottom of the dead-soft high seam shovel vertex cut according to claim 1, it is characterized in that, wherein, the Matching Relationship that work plane full-seam mining hydraulic support and drag conveyor and coal-winning machine form be the coal-winning machine cut when mining the back timber front end to the distance of rib close to zero or during negative value, hydraulic support is passed jack piston rod and is in whole retracted states.
3. formula full-seam mining is combined mining method at the bottom of the dead-soft high seam shovel vertex cut according to claim 1, it is characterized in that, the front end of hydraulic support back timber is forestope, and the forestope front end is the shovel extensible canopy, and the shovel extensible canopy is built-in for the jack that connects and support the shovel extensible canopy.
4. combine mining method according to formula full-seam mining at the bottom of claim 2 or the 3 described dead-soft high seam shovel vertex cuts, it is characterized in that wherein, the flexible stroke of extensible canopy jack cuts dark greater than one of coal-winning machine.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405392A (en) * | 2014-10-16 | 2015-03-11 | 河南理工大学 | Three-soft thick coal seam roadway top-support bottom-retaining anchor-net cable active supporting fully-mechanized caving mining method |
| CN105134212A (en) * | 2015-08-10 | 2015-12-09 | 河南理工大学 | Method for ensuring fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top |
| CN109083642A (en) * | 2018-10-31 | 2018-12-25 | 攀枝花学院 | Compound coal mining system for large-mining-height working surface |
| CN109209367A (en) * | 2018-10-31 | 2019-01-15 | 攀枝花学院 | Fully mechanized mining for high working face coal wall |
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| DE2806767A1 (en) * | 1978-02-17 | 1979-08-23 | Gewerk Eisenhuette Westfalia | Underground mine coalface working machine - has tool holders swivelling vertically on demolition caps by frame with parallel support arms |
| CN101498216A (en) * | 2009-03-06 | 2009-08-05 | 太原理工大学 | Thick coal seam large height workface step coal wall coal mining method |
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| CN101936164A (en) * | 2010-08-17 | 2011-01-05 | 天地科技股份有限公司 | Very soft thick coal seam forepoling hold top coal caving mining method and hydraulic support structure |
| CN101936163A (en) * | 2010-06-01 | 2011-01-05 | 中国矿业大学 | Method for recovering large mining height fully-mechanized face end part ground coal |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2806767A1 (en) * | 1978-02-17 | 1979-08-23 | Gewerk Eisenhuette Westfalia | Underground mine coalface working machine - has tool holders swivelling vertically on demolition caps by frame with parallel support arms |
| CN101498216A (en) * | 2009-03-06 | 2009-08-05 | 太原理工大学 | Thick coal seam large height workface step coal wall coal mining method |
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| CN101936163A (en) * | 2010-06-01 | 2011-01-05 | 中国矿业大学 | Method for recovering large mining height fully-mechanized face end part ground coal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405392A (en) * | 2014-10-16 | 2015-03-11 | 河南理工大学 | Three-soft thick coal seam roadway top-support bottom-retaining anchor-net cable active supporting fully-mechanized caving mining method |
| CN105134212A (en) * | 2015-08-10 | 2015-12-09 | 河南理工大学 | Method for ensuring fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top |
| CN109083642A (en) * | 2018-10-31 | 2018-12-25 | 攀枝花学院 | Compound coal mining system for large-mining-height working surface |
| CN109209367A (en) * | 2018-10-31 | 2019-01-15 | 攀枝花学院 | Fully mechanized mining for high working face coal wall |
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Application publication date: 20130710 |